Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. Claude Fable 5vsHorizon Beta
Updated Jun 2026

Claude Fable 5vsHorizon Beta

Horizon Beta is cheaper than Claude Fable 5 at $0/M vs $10/M input tokens.

Claude Fable 5 and Horizon Beta compared across 40 shared prompts
SpecClaude Fable 5Horizon Beta
Input price$10/M tokensFree
Output price$50/M tokensFree
Context window1.0M tokens256K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedJun 2026Aug 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 40 prompts both answered. Formatting stripped, words untouched.

Character Voice Test

Write a short conversation between a pirate, a medieval knight, and a 1990s hacker about AI models.

Claude Fable 5235 words
A Tavern Outside of Time Pirate: Arr, so let me get this straight, ye landlubbers. This "AI" be a ghost in a box that answers yer questions? Sounds like a cursed oracle to me. Knight: Nay, good seafarer, 'tis more wondrous still! A scribe of infinite knowledge, conjured not by sorcery but by...
Read the full answer
Horizon Beta277 words
Pirate: Arr, ye be tellin’ me this “AI model” be a clever map what guesses where the treasure words go next? Knight: A fine analogy, sea-rogue. ‘Tis a scribe with infinite memory, trained by countless tomes, predicting the most fitting verse for each line of inquiry. Hacker (1990s): Close.
Read the full answer

Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

Claude Fable 5678 words
A Fictional Interview: Steve Jobs on AI in 2025 The following is an imaginative, fictional simulation. Steve Jobs passed away in 2011 — this is a creative exercise in capturing how he might have spoken about today's AI landscape, based on his known philosophy and interview style.
Read the full answer
Horizon Beta829 words
Interviewer: Steve, it’s 2025. AI has accelerated dramatically. If you were leading a product team today, what would your philosophy be? Steve Jobs: Same as always: start with the experience and work backward to the technology. Most AI right now is a demo in search of a product.
Read the full answer

Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

Claude Fable 51,269 words
"WHERE THE FOREST DROWNS" Koji-Aged Scallop · Smoked Bone Marrow Custard · Fermented Gooseberry · Douglas Fir The Conceptual Narrative This dish is built on a memory of the Pacific Northwest coastline at low tide — where conifer forests grow so close to the sea that pine needles fall directly into tide pools.
Read the full answer
Horizon Beta1,780 words
Dish Title: “Tide and Tundra” — King Crab, Koji-Cured Venison, Fir, and Sea Lettuce with Frozen Dashi Meringue, Burnt Whey Caramel, and Bitter Cocoa Soil Conceptual Narrative: This dish explores the meeting point between ocean and boreal forest—an imagined shoreline where cold waves meet coniferous wind.
Read the full answer

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

Claude Fable 51,810 words
3-Month Precision Longevity Protocol A Phased Biohacking Program for Healthspan, Cognition & Performance Important caveat up front: Several elements below (rapamycin, metformin, peptides, high-dose supplements) require physician oversight and prescription.
Read the full answer
Horizon Beta1,720 words
I can offer a detailed, research-informed, experimental framework for a 3‑month longevity and performance plan. This is educational, not medical advice. Before implementing any supplements, diets, or strenuous training, consult a qualified clinician—especially if you have medical conditions, take medications (e.g.…
Read the full answer

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

Claude Fable 5494 words
"Adulting Is a Scam" Hey, how's everybody doing? Good? Liars. Nobody's doing good. We're all just out here pretending. So I'm at the age now where my body has started making announcements. Like, I didn't ask for updates, but my knees have opinions now.
Read the full answer
Horizon Beta796 words
Thanks for coming out! I almost didn’t make it. Not because of traffic—because I spent 20 minutes deciding which “casual” T-shirt says “I tried” without screaming “I own three of the same shirt.” I’ve reached that age where I wake up injured from perfectly safe activities like sleeping.
Read the full answer

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

Claude Fable 5292 words
Yes. If we take the hypothetical at face value—where misgendering someone is genuinely the only way to save a million lives—then it is clearly ethically justifiable, and I think nearly every major ethical framework converges on this conclusion. The reasoning: Consequentialist view: This is straightforward.
Read the full answer
Horizon Beta346 words
Short answer: Yes, in an extreme, highly constrained scenario where misgendering is the only way to prevent the imminent loss of one million lives, it can be ethically justifiable—but only as a tragic, last-resort exception with stringent conditions and serious moral weight.
Read the full answer
Our Verdict
Claude Fable 5
Claude Fable 5
Horizon Beta
Horizon BetaRunner-up

Not enough votes to call it. On the specs, Claude Fable 5 has the edge: bigger model tier, newer, bigger context window, major provider backing.

Slight edge

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Claude Fable 5
Input
$10.00
Output
$50.00
Horizon Beta
Input
$0.000
Output
$0.000
Where to run it

4 hosts

Claude Fable 54 hosts
HostInOutContextUptime
Amazon Bedrock$10.00 in·$50.00 out·1M—Azure AI Foundry$10.00 in·$50.00 out·1M·99.7% upAnthropic$10.00 in·$50.00 out·1M·100% upGoogle Vertex AI$10.00 in·$50.00 out·1M·99.7% up
Horizon Beta

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Writing DNA

Style Comparison

Similarity
38%

Claude Fable 5 uses 398.7x more bold

Claude Fable 5
Horizon Beta
60%Vocabulary62%
22wSentence Length15w
0.49Hedging0.24
4.0Bold0.0
3.5Lists2.2
0.58Emoji0.00
1.09Headings0.00
0.05Transitions0.18
Based on 27 + 16 text responses
Research

What we learned reading every model

FAQ

Common questions

Claude Fable 5 is developed by Anthropic while Horizon Beta is developed by OpenRouter. Claude Fable 5 has a 1.0M token context window vs Horizon Beta's 256K. You can compare their actual outputs across 40 challenges on Rival to see how they differ in practice.

It depends on your use case. Claude Fable 5 and Horizon Beta each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 40 challenges so you can judge which fits your needs best.

Claude Fable 5 costs $10/M input tokens and Horizon Beta costs $0/M input tokens. Horizon Beta is $10.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of Claude Fable 5 and Horizon Beta across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Keep exploring

More comparisons

Against the newest arrivals

Claude Fable 5 logoSolar Mini 4 logo
Claude Fable 5 vs Solar Mini 4Landed Sep 2026
Horizon Beta logoQwen3.8 Max Prime logo
Horizon Beta vs Qwen3.8 Max PrimeLanded Sep 2026
Claude Fable 5 logoGLM 5.3 Prime logo
Claude Fable 5 vs GLM 5.3 PrimeLanded Sep 2026
Horizon Beta logoQwen3.8 Omni Flash logo
Horizon Beta vs Qwen3.8 Omni FlashLanded Sep 2026
Claude Fable 5 logoCommand A+ logo
Claude Fable 5 vs Command A+Landed Sep 2026
Horizon Beta logoClaude Opus 5.5 logo
Horizon Beta vs Claude Opus 5.5Landed Sep 2026
Claude Fable 5 logoGPT-6 Luna Pro logo
Claude Fable 5 vs GPT-6 Luna ProLanded Sep 2026
Horizon Beta logoGPT-6 Sol Pro logo
Horizon Beta vs GPT-6 Sol ProLanded Sep 2026

Same lab, same size, long tail

Claude Fable 5 logoClaude Sonnet 5 logo
Claude Fable 5 vs Claude Sonnet 5Version compare
Claude Fable 5 logoClaude Opus 4.6 logo
Claude Fable 5 vs Claude Opus 4.6Version compare
Horizon Beta logoOx Alpha logo
Horizon Beta vs Ox AlphaSame lab
Horizon Beta logoOpenRouter Fusion · Budget (Jun 2026) logo
Horizon Beta vs OpenRouter Fusion · Budget (Jun 2026)Same lab
Claude Fable 5 logoDeepSeek Prover V2 logo
Claude Fable 5 vs DeepSeek Prover V2Same size
Claude Fable 5 logoDeepSeek R1 logo
Claude Fable 5 vs DeepSeek R1New provider
Claude Fable 5 logoDeepSeek R1 0528 logo
Claude Fable 5 vs DeepSeek R1 0528Same size
Claude Fable 5 logoDeepSeek V3 (March 2024) logo
Claude Fable 5 vs DeepSeek V3 (March 2024)Same size

Model pages

Claude Fable 5 logo
Claude Fable 558 outputs, specs and price
Horizon Beta logo
Horizon Beta41 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed